Ecumenical Patriarch Ioannes VIII

Ecumenical Patriarch Ioannes VIII (1006-1075) was the Ecumenical Patriarch of Constantinople from 1064 to 1075, succeeding Ecumenical Patriarch Konstantinos III and preceding Ecumenical Patriarch Kosmas I.

Biography
Ioannes was born in 1006 to the House of Xiphilinos, and during his reign, he served as a vassal of the Byzantine Empire. Ioannes reigned from 1064 to 1075, and he served as the spiritual leader of Orthodox Christianity, which had finally split from Catholicism only ten years older in the Great Schism.